from rest_framework import serializers
from django_redis import get_redis_connection

from .utils import check_save_user_token
from user.models import User
from .models import OAuthQQUser


# 定义序列化器
class QQAuthUserSerializer(serializers.Serializer):
    """qq登陆创建用户序列化器"""
    access_token = serializers.CharField(label='操作凭证')
    mobile = serializers.RegexField(label='手机号',regex=r'^1[3-9]\d{9}$')
    password = serializers.CharField(label='密码',max_length=20,min_length=8)
    sms_code = serializers.CharField(label='短信验证码')

    def validate(self, data):
        # 检验access_token
        access_token = data['access_token']
        # 获取身份证凭证
        openid = check_save_user_token(access_token)
        if not openid:
            raise serializers.ValidationError('无效的access_token')

        # 将openid放在校检字典中,后面还会使用
        data['openid'] = openid

        # 检验短信验证码
        mobile = data['mobile']
        sms_code = data['sms_code']
        redis_conn = get_redis_connection('verify_code')
        real_sms_code = redis_conn.get('sms_%s' % mobile)
        if real_sms_code.decode() != sms_code:
            raise serializers.ValidationError('短信验证码错误')

        # 如果用户以存在
        try:
            user = User.objects.get('mobile=mobile')
        except User.DoesNotExist:
            # 如果以存在,直接跳转,所以这里直接以能够pass
            pass
        else:
            password = data['password']
            if not user.check_password(password):
                raise serializers.ValidationError('密码错误')

            # 将认证后的user放进校检字典中,后续会使用
            data['user'] = user
        return data

    def create(self,validated_data):
        # 获取校验的用户
        user = validated_data.get('user')

        if not user:
            # 用户不存在
            user = User.objects.create_user(
                username = validated_data['mobile'],
                password = validated_data['password'],
                mobile = validated_data['mobile'],
            )

        # 将用户绑定到openid
        OAuthQQUser.objects.create(
            openid = validated_data['openid'],
            user = user
        )
        # 返回用户是数据
        return user